we are tyco integrated security. and we are sharper. >>> welcome back to this special edition of the "cnn newsroom." i'm fredricka whitfield here in atlanta. we'll get back to boston with wolf blitzer in a moment. overseas in london, runners in another marathon race are remembering the bombings in boston. take a look at this video from the bbc. huge crowd despite the concerns about safety. the london marathon went on as planned. 35,000 strong. extraordinary. participants observed a moment of silence to pay tribute to those killed and injured in boston. and in the wheelchair division in london, an ethiopian racer won for a second time. the woman who won the boston wheelchair competition also raced in london. here is her story. >> it was her first boston marathon. tatyana mcfadden had won. she placed first in the women's wheelchair division. >> my family was there. and you know, they had tears in their eyes of joy, and we celebrated a little bit at the finish line. >> hours after she finished her race, the bombers stru